Buell 2002 P3 Service Manual page 390

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Speedometer Needle Sweep Test
The tester's sweep function moves the speedometer needle
through the full range of movement. This allows for testing the
smoothness of operation and checking for hesitancy or a
stuck needle.
1. See Figure 7-89. Disconnect speedometer sensor con-
nector. Attach speedometer tester connector to speed-
ometer sensor connector.
2. Place speedometer tester power switch in the ON posi-
tion. Place signal switch in the OUT position.
3. Turn vehicle ignition switch ON.
4. Begin test by pressing 0 on the tester keypad, then
pressing ENTER. The tester will scan for two seconds,
then the tester will put out a 1 Hz signal.
5. Select a test range.
a. Press 2 to select LO range (1-20 Hz).
b. Press 5 to select CEN range (21-999 Hz).
c. Press 8 to select HI range (1000-20,000 Hz).
6. After selecting a range, use the corresponding arrow
keys to accelerate through the range. As you move
through the speed range, check for smooth needle
movement.
a. If testing LO range, press 1 or 3.
b. If testing CEN range, press 4 or 6.
c. If testing HI range, press 7 or 9.
Speedometer Sensor Test
If the speedometer is inoperative, but backlighting and odom-
eter work, the speedometer sensor may not be working.
See Figure 7-90. Fabricate a test harness using the following
parts.
●
Two Deutsch 3-place socket housings (Part No. 72113-
94BK).
●
Deutsch 3-place pin housing (Part No. 72103-94BK).
●
Six lengths of 18 gauge wire, each 6.0 in. (15 cm) long.
●
Six socket terminals (Part No. 72191-94).
●
Six pin terminals (Part No. 72190-94).
●
Two secondary locks (socket) (Part No. 72153-94).
●
Two secondary locks (pin) (Part No. 72143-94).
1. Deutsch Socket Housing (2)
2. Deutsch Pin Housing
1
a0263x7x
Figure 7-90. Test Harness
Before attempting the actual speedometer sensor check, two
system checks must be made. Install the test harness at the
speed sensor connector [65]. See
●
●
1.
2.
3.
4.
5.
6.
SPEEDOMETER TROUBLESHOOTING CHART DIAGNOS-
TIC NOTES: The reference numbers below correlate with
those on the diagnostic flow charts found on the follow-
ing pages.
1
2
3
4
5
6
7
8
2
9
1
10
Test for voltage to sensor by checking for 8-12 VDC on
red wire in connector [65B].
Then check for continuity to ground on black wire in con-
nector [65B].
Raise rear wheel off floor using REAR WHEEL SUP-
PORT STAND (Part No. B-41174).
Install the test harness between the speedometer sensor
connectors [65A] and [65B].
Place speedometer tester power switch in the ON posi-
tion. Place signal switch in the IN position.
Plug the speedometer tester into the test harness. Turn
vehicle ignition switch ON.
Press ENTER on the tester keypad.
Rotate the motorcycle's rear wheel.
a. If reading on speedometer tester changes as wheel
is rotated, speedometer sensor is OK.
b. If reading does not change, speedometer sensor is
suspect. Remove sensor and check for debris,
clean, replace sensor and retest. If still non-func-
tional, install a known, good speedometer sensor
and test again for proper operation.
To enable diagnostic mode: press odometer reset switch
and turn ignition/key switch to ON.
To clear codes: depress and hold reset switch for 5 sec-
onds with set code displayed.
To return speedometer to normal operating state: cycle
ignition/key switch.
Remove seat. See 2.28 SEAT.
Test results may be inaccurate if tester battery is low.
Refer to 7.27 SPEEDOMETER
CHECK.
Sensor can also be tested with Speedometer Tester
(HD-41354) and Test Harness. See SPEEDOMETER
SENSOR TEST.
Remove sensor and check for accumulation of debris on
sensor; if debris is not present, replace sensor. If debris
is present, clean sensor and repeat test. Replace sensor
as required. See 7.26 SPEEDOMETER
Sweep tool has frequency jumps in full scale sweeps.
Perform sweep in 3 stages as described in speedometer
tester manual.
Disconnecting speed sensor or install speedometer sen-
sor will cause code d02 to set.
2002 Buell P3: Electrical
Figure 7-90.
PERFORMANCE
SENSOR.
7-63